For example, we have a table ACCOUNT (snowflake dimension containing other dimension keys) and I have many fact tables based on this dimension. Normally datawarehouse load happens like first dimensions needs to be loaded and then facts. Our frequency of loads is 30 mins.

To increase the rate in which the data will be available in the facts (as its a financial application), am considering to have two batches one with dimension and another one with fact (came to this conclusion as there is no dependency like first dimensions to be loaded then only fact) just the update might get missed sometimes. But if I do that, when dimension gets loaded, it will be read in the facts in another session. Will this affect the performance ?

LOADING (insert/update) and selecting data from table at the same time. Will it affect the performance in any way >